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Gamophyceae: Zygnematales: Desmidiaceae

Euastrum didelta
Ralfs ex Ralfs 1848

Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)

Species: Cell body 115-150 μm long, 53-70 μm wide, L/W=2.0, isthmus 18-26 μm wide; (Illustrations of The Japanese Fresh-water Algae, 1977).
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